Objects in the image:
category: person
category: umbrella
category: tennis racket
category: person
category: person
category: person
category: person
category: tennis racket
category: person
category: person
category: person
category: umbrella
category: person
category: person
category: tennis racket
category: person
category: person
category: sports ball

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it one of the players on the near court?
a: Yes
q: are they wearing a top?
a: No
q: is it he man in the red shorts?
a: Yes